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In any triangle, the square of the side opposite an acute angle is equal to the sum of the squares of the other two sides diminished by twice the product of one of those sides and the projection of the other upon that side.
Elements of Plane and Solid Geometry - Page 188
by George Albert Wentworth - 1877 - 398 pages

## Eshbach's Handbook of Engineering Fundamentals

Ovid Wallace Eshbach, Byron D. Tapley - Technology & Engineering - 1990 - 2104 pages
...perpendicular to AC. The square of the side opposite an acute angle equals the sum of the squares of the other two sides diminished by twice the product of one of those sides by the orthogonal projection of the other side upon it. In Fig. 2.8, a2 = b~ + c2 - 2b • AE. The...

## Biennial Report, Volumes 8-11

1889 - 1032 pages
...In any triangle the square of the side opposite an acute angle Is equal to the sum of the squares of the other two sides diminished by twice the product of one of sides and tbe projection of the other upon that side. SCHOOL LAW. 1. Name the different grades of certificates...